Device memory

the g1 has 256MB 128 for os and the other for system installed apps, then that lives you about 70 or less to play with. apps are range from about 20KB to 10MB. u do the math. (that is on a unrooted phone)

rooted phone apps can be install on to an ssd mc schd card 16GB of space if not 32GB. but dont trust my intel just google it. all information are on the web...